ach jo.
http://support.microsoft.com/kb/330314

použij google translator,

Windows 98
To repair a Windows 98 operating system, you must boot the computer to a command prompt by using a startup disk. Next, manually replace MSVCRT.dll in the C:\Windows\System folder with a copy of the file from the Windows 98 CD or with a copy of the file from a computer that is successfully running Windows 98