You'll find it to be a virus or trojan. I would not reinstall it.
I have been plagued by my old Dell Dimension xps, that runs on Windows 98, constantly booting up and then giving me these messages: (X)Cannot find the file "dllreg.exe" (or one of it's conponents). Make sure the path and file name are correct and that all required libraries are available. And then right after that I get: (!)Could not load or run "dllreg.exe" specified in the WIN.INI file. Make sure the file exists on your computer or remove the reference to it in the WIN.INI file. My desktop then loads but I have problems later. I have rerun the setup for Windows 98 twice now and then same thing is hapopening. Can someone help me PLEASE??
"Make sure the file exists on your computer or remove the reference to it in the WIN.INI file."
As Bob said, you definitely shouldn't do the first. So do the second! It can be in win.ini or in the registry. You can use Notepad for win.ini and regedit for the registry, but it's easier to uncheck dllreg in the Startup tab of msconfig (start>run>msconfig), I should say.
But a program not present can't give problems, other then this innocent and enlightening message. So if you've got problems ('constant rebooting') you must have more malware on board. Do you regularly update your antivirus? Try an online check with antivirus.housecall.com, and if that doesn't help download and run adaware and spybot. There's a fair chance these programs will solve the problem (and a somewhat smaller chance they won't).
Post again if necessary, telling what you did and found.
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