2 operating systems?

Win98 will install on 512MB RAM perfectly & runs smoothly but that happened in 2004.

Few things pointed by many members like your system is x64 but has only 1GB RAM when it is recommended that a 3GB for x32 & 4GB for x64 is required to run them smoothly.

You can try running Win98 in VMWare Workstation without removing Windows7, it just act like a virtual HDD but again without proper RAM it'll just going to be difficult to make the system run smooth.

fredrik2011 said:

It's a desktop cpu, but I have no idea what make it is! The computer is totally blank of something...
I have AVG free antivirus

You can try softwares like Win7Manager: Optimize, tweak, clean, speed up and repair Windows 7 - Windows 7 Manager or SIW: Buy SIW Pro or Download SIW Freeware to get complete information of your hardware including that of OS & other complete details of your PC.

""As a Doctor can't prescribe a medicine to a patient over the phone similarily on 7forum we need your system specs (as much information possible) to HELP you in the right way.""

gregrocker said:

If you have 2gb of RAM then it should run Win7 fine, although you may need to reinstall 32 bit to make it really fast.

Follow the clean-up steps I gave you in my first post

gregrocker said:

to see how much better it can run.

It is nonsense to try to revert to an obsolete OS without first troubleshooting Win7 to run correctly as it should on 2gb of RAM.

Well do agree with you Greg that why to try an Obsolete OS when you can still make Windows7 run just fine even with a 2GB of RAM.

@Greg i want to know can "fredrik2011" run another OS in VMWare probably Windows7 to make it a little smooth??