Bad Image error

[donutman123]

I was browsing, and went to filefront.com. A pop-up popped-up and i couldn't close it. It kept saying End NOw!? So I said yes. It still didn't work, so I clicked on my power button. I restarted my computer, and everytime I opened a program or such, it would say "The application or DLL C:\WINDOWS\System32\tasasify.dll is nota valid Windows image. Please check this against your installation diskette. I googled it for troubleshooting, and it turns out others have had errors like this, although it doesn't end with the same program dll (in my case, tasasifu.dll) Any Ideas? All the others told me to install a range or programs, and they don't seem safe. Any ways how to fix this error?