What Should I Do if My PC Repair Shop Installed Potentially Infected Software?

It sounds like a red flag to me; installing something like DriverPack without fully understanding how it interacts with security software is a mistake. I’d suggest doing a clean install of Windows instead of just resetting it. You can follow a standard guide for installing Windows 11, and I would definitely avoid that repair shop in the future! It's concerning that they would even try to use that software in the first place.

It's pretty embarrassing for them to mess up like this and still call themselves techs. Definitely use Revo Uninstaller to get rid of that software, and for drivers, just go with Windows Update or the manufacturers' sites. I'd also suggest asking for a refund and just doing a fresh install yourself for peace of mind.

First off, I recommend uninstalling DriverPack using Revo Uninstaller, which is a free tool. It will first run DriverPack's own uninstaller, and then you can use Revo to scan for any leftover files and remove them completely. Just make sure to select 'All leftovers' before deleting, and don't reboot until you've done the Revo scan! After that, I'd run a scan with Malwarebytes for any potential malware just to be safe.

Honestly, I think you should consider this shop incompetent. If you have concerns about possible infections, a chargeback might be a wise move. It’s ridiculous they’d install such questionable software, and it reflects poorly on them. I’d also recommend pulling drivers directly from trusted sources like Nvidia or AMD, not some random package.