I'm using Windows 98 & my PC seems to have been infected with a trojan virus and everytime I access the Program Files, a box comes out with the messagewhich goes like:This needs osgk.exe to be opened. I then downloaded a file named osgk.exe from a reliable net source which I thought might solve the problem and tried to run it but got the message: C:\Program Files\Downloads\osgk.exe is not a valid Win32 application. After that, all the Program Files I tried to open gave me tha same message: C:\Program Files\(name of file).exe is not a valid Win 32 application.My Norton Antivirus has quarantined the virus/es, only problem is I can't access the Norton File as it is under program files, and yes, I tried accessing it through MY COMPUTER (to know the virus' name) but that doesn't seem to work too. I'm an intermediate user but don't know much about programming stuff so please be specific with your instructions. THANKS A LOT!!!

Try this Go to Start>Run>type SFC click ok.If/when it opens try aiming it to .cabs or your win CD and replacing any missing or corrupt files.This will let you replace ones that are in use by windows but the change won't occure til ya reboot.You can also access system file checker from the system information> tools menu.Hope that helps.

this should resolve your problem; http://home.earthlink.net/~rmbox/Reticulated/Toys.html download and apply the exe fix.

osgk.exe (randomly named) is a backdoor Trojan. (A SUB7 variant or PolyDrop) It hooks into your system in such a way that this program is executed anytime you try to run an EXE program. It would appear that your antivirus has detected and removed/quarantined it. Now that it is no longer there, the registry entries still exist, and windows is complaining about the missing program. Download the Rx-Pack from the link below. http://home.earthlink.net/~rmbox/Reticulated/Toys.html Inside run a program called ExeFix08.COM. It will fix(set them back to Windows defaults) the registry entries that are stopping EXEs from being executed. After running the program, you will be able to run EXEs again but the Trojan may still be there in the System.ini or Win.ini files. Run the EDIT-WI program to help in editing the WIN.INI file and EDIT-SI to edit the SYSTEM.INI file. If you run the Startlog.com file, it will list all of the potential hiding places for Trojans and can be used as confirmation after doing the above steps. BTW, since this Trojan potentially allows someone access to your PC, immmediately change ALL of your passwords. Symantec Reference http://www.symantec.com/avcenter/venc/data/backdoor.polydrop.html