SEATTLE (Reuter) - Microsoft Corp. said Friday some customers are experiencing problems installing its new Windows 95 operating system because of viruses on their computers.
The software giant said the virus is not caused by the Windows 95 program, and ``has not been a significant call generator'' on its technical support lines.
Customers with the problem get an error message after they insert the second of the program's 13 diskettes and are unable to complete installation. The message means the diskette is destroyed and must be replaced.
Microsoft recommended that customers scan their computers for any viruses before installing Windows 95. It said the problem also can be averted if customers flip up the ''write-protect'' tab on the back of the diskettes before installing them.
Separately, Symantec Corp. said it is offering a free disk operating system scan to PC users who are not protected by an antivirus program and who are upgrading to Windows 95.
The scan is accessible via Symantec's BBS and FTP sites, Compuserve, America Online and Microsoft Network. Symantec's BBS can be reached at 503-484-6699 (300, 1200 and 2400 baud modems); and 503- 484-6669 (9600 and 14400 baud modems). Its FTP address is FTP.SYMANTEC.COM.
On Compuserve, America Online and Microsoft Network, users should go to the Symantec Forums and look in the Norton AntiVirus section for NAVSCANZ.EXE (self-extracting ZIP file).
Symantec, based in Cupertino, Calif., makes system software products and is a leading detector of computer viruses.
Microsoft customers with operating problems can call 800-936-4200 for a recording or fax of answers to common questions.
Microsoft's stock fell $1.625 to $90.875 on Nasdaq in late morning trading. Symantec's stock rose $2.375 to $31.25 on Nasdaq, where it was among the most active issues.