So a while back, I noticed that one of my flash drives for some unknown reason got the Win32 Pioneer virus. I disinfected the infected files on it with Kaspersky and thought nothing of it. Fast forward to last Thursday. I was using a WInPE based flash drive (the same thing I disinfected previously) for some stuff and I noticed some programs I added to it had changed file sizes and were refusing to load. No problem I thought, replaced them with the originals from backups stored on my laptop's SSD. Then it happened again, they changed back to the previous damaged state as before. The flash drive was pretty new so I knew that wasn't an issue. Then more programs started to go bad on it. At this point I realized the flash drive may have still been infected or something. I the rebooted and formatted that thing clean. I go back home and power on the laptop again to do something, and decided to check Kaspersky to see if anything was detected, and I was immediately greeted with warning after warning of infected program files from my boot SSD. I let it disinfect it all, and since I was tired I made the grave mistake of not disconnecting the WiFi (hence I put my campus network at risk since this virus does transmit itself over networks). I rebooted and everything seemed fine... As for the flash drive, when I plugged it into my desktop, Kaspersky lost its mind and went crazy blocking infected program files that were supposedly on there. Yeah, quick formatting an infected flash drive and plugging it into a clean computer is a horrible idea. Luckily the desktop didn't get infected. I nuked that drive with BleachBit's "wipe free space" option to finish the virus off. Next morning I got to study for an exam, and immediately noticed that Kaspersky had been completely destroyed on that bootup. I immediately shut off Windows to prevent whatever "undead" leftover of this virus that was still there from spreading over the campus network. Luckily I had a dual-boot with Linux so I could still finish my studying. I ended up later formatting both the SSD (including the Linux install, just in case) and the storage HDD. Good thing I had a very recent backup of most important files. If this virus hits you. Shut down your PC immediately, and reinstall Windows after deleting all partitions on all drives. So yeah, lesson learnt, even a girl like me who is extremely paranoid over cybersecurity can get hit once in a while. This was literally the worst infection I've had since my Windows XP days.