I'm in a lot of trouble now. My neighbor's PC was acting really really slow, couldn't open this and that and AV had conflict, etc. So I volunteered myself to be Mr. Fix-it and took the PC home, wiped the drive, and starting to reinstall everything.
After installing a known good version of Win98 SE (for 800MHz machine with 128MB RAM), it has ? with the onboard Ethernet, video and audio, won't find the proper drivers from the Win98 CD, nor the ATI driver CD in the video's case. Now I have no internet connection, graphics run at 16 colors, and no sound. And I have to face my neighbors. :(
Yes I formated the drive with format c: /s, fdisk-ed it first, no errors.