What Saint2.su is and why you're seeing it
Saint2.su is an ad network that displays pop-ups, banners, and redirects in your browser. You're seeing it because either a website you visit uses it to show ads, or your browser has picked up adware — software that forces ads to appear whether the website wants them there or not.
The difference matters. If Saint2.su ads only show up on one specific website, that site chose to use that ad network and you can block it there. If the ads appear everywhere you browse, or if clicking links sends you to Saint2.su first, you have adware installed and need to remove it from your computer.
Most people deal with both: a browser that's been modified to show extra ads, plus ads from networks like Saint2.su on the sites they visit. The steps below handle each situation.
Key Takeaways
- Saint2.su ads come from either websites that use that ad network, or from adware installed on your computer that forces ads into every page.
- An ad blocker stops Saint2.su ads on websites, but won't remove adware — you need to uninstall the adware program itself.
- Check your browser's extensions and installed programs for anything you don't recognize, especially anything installed recently.
- If ads keep appearing after removing adware, reset your browser settings to remove any toolbars or homepage changes the adware made.
Install an ad blocker to stop ads on websites
An ad blocker is a browser extension that prevents ads from loading on the websites you visit. It won't remove adware from your computer, but it will stop Saint2.su ads (and most others) from showing up on web pages.
The most common ad blockers are uBlock Origin, Adblock Plus, and AdGuard. All three work the same way: install the extension, and ads stop appearing. uBlock Origin is free and lightweight — it uses less computer memory than the others.
To install uBlock Origin in Chrome: go to the Chrome Web Store, search for "uBlock Origin", click the extension, and click "Add to Chrome". In Firefox, go to addons.mozilla.org, search for "uBlock Origin", and click "Add to Firefox". In Safari, uBlock Origin is available through the App Store. Once installed, the extension runs automatically on every page you visit.
If you already have an ad blocker and Saint2.su ads still appear, the ads may be coming from adware on your computer rather than from websites. Move to the next section.
Check your browser extensions for adware
Adware often installs itself as a browser extension so it can inject ads into every page. Check what extensions you have and remove anything you don't recognize or don't remember installing.
In Chrome, click the three-dot menu in the top right, go to "More tools", then "Extensions". Look through the list. If you see anything unfamiliar — especially anything with a generic name like "Web Helper" or "Search Enhancer" — click the trash icon to remove it. In Firefox, click the menu button (three horizontal lines), go to "Add-ons", click "Extensions", and remove anything suspicious the same way. In Safari, go to "Safari" menu, click "Preferences", go to the "Extensions" tab, and remove anything you don't recognize.
After removing suspicious extensions, restart your browser completely — close all windows and open it again. Then visit a website and see if Saint2.su ads still appear.
Uninstall adware programs from your computer
If ads keep appearing after you've removed browser extensions, you likely have adware installed as a program on your computer itself. Adware programs run in the background and modify your browser to show ads, even if you remove the extension.
On Windows, go to Settings, click "Apps", then "Apps & features". Look through the list of installed programs. Anything you don't recognize — especially anything installed recently — may be adware. Look for programs with names like "Search Protect", "WebCake", "Optimizer Pro", or anything that sounds like a browser tool you didn't intentionally install. Click it and select "Uninstall". Windows will walk you through removing it.
On Mac, open Finder, go to the Applications folder, and look through the list. Anything unfamiliar should be dragged to the Trash. Then empty the Trash. If a program asks for your password when you try to delete it, that's a sign it's adware — adware often protects itself this way. If you can't delete it, restart your Mac in Safe Mode (hold Shift while it starts up) and try again.
After uninstalling, restart your computer completely. Then open your browser and check whether the ads are gone.
Reset your browser settings to remove toolbars and homepage changes
Adware often changes your browser's homepage, search engine, or adds toolbars. Even after you remove the adware program, these changes may stay. Resetting your browser clears all of these modifications.
In Chrome, click the three-dot menu, go to "Settings", then "Reset and clean up", and click "Restore settings to their original defaults". Chrome will ask you to confirm. In Firefox, click the menu button, go to "Help", then "More troubleshooting information", and click "Refresh Firefox". In Safari, go to the Safari menu, click "Preferences", go to the "General" tab, and make sure your homepage is set to something you recognize — not a search site you didn't choose.
After resetting, your browser will look like it did when you first installed it. Your bookmarks and saved passwords stay, but any toolbars, homepage changes, or search engine modifications will be gone.
Run a malware scan if ads persist
If Saint2.su ads still appear after removing extensions, uninstalling programs, and resetting your browser, you may have malware deeper in your system. A malware scanner can find and remove it.
Windows Defender (built into Windows) can scan your computer. Open Windows Security, click "Virus & threat protection", and click "Scan options". Choose "Full scan" and click "Scan now". This takes 15 to 30 minutes. On Mac, Malwarebytes is a free scanner that catches adware Windows Defender sometimes misses. Download it from malwarebytes.com, install it, and run a scan.
If a scan finds something, the scanner will ask whether to remove it. Click yes. After the scan finishes and any threats are removed, restart your computer and check your browser again.
Prevent adware from installing in the future
Most adware arrives when you download a program from an unfamiliar website or click a suspicious link. A few habits prevent it.
Download programs only from official sources: the Microsoft Store for Windows programs, the App Store for Mac, and the official website of the program itself. If you download something from a third-party site, read the installation screens carefully — adware often hides in checkboxes that say things like "Install the Search Protect toolbar" or "Set this as your homepage". Uncheck anything you didn't ask for.
Be cautious with browser extensions. Only install extensions from the official store for your browser (Chrome Web Store, Firefox Add-ons, Safari App Store). Don't install extensions from random websites, and regularly review your installed extensions to remove anything you no longer use.
Frequently Asked Questions
Will an ad blocker remove Saint2.su from my computer?
No. An ad blocker stops ads from showing on websites, but it doesn't remove adware programs. If Saint2.su ads appear on every website you visit, or if you're redirected to Saint2.su when you click links, you have adware installed and need to uninstall it as a program, not just block ads.
Why do Saint2.su ads keep appearing even after I installed an ad blocker?
The ads are probably coming from adware on your computer, not from the websites themselves. Check your browser extensions for anything unfamiliar, then check your installed programs for anything you don't recognize. Uninstall anything suspicious and restart your computer.
Is Saint2.su a virus?
Saint2.su itself is an ad network, not a virus. But the software that forces Saint2.su ads to appear on your computer is adware, which is malicious software. It won't destroy your files, but it will slow your browser and expose you to more ads and potentially dangerous websites.
What if I can't uninstall an adware program?
Adware often protects itself from deletion. Restart your computer in Safe Mode (hold Shift while Windows starts, or hold Command-S while Mac starts) and try uninstalling again. Safe Mode disables most background programs, which gives you permission to delete things that normally block deletion.
Do I need to pay for a malware scanner?
No. Windows Defender is free and built into Windows. Malwarebytes has a free version that scans and removes adware. You don't need to pay for protection against Saint2.su or similar adware.