At 13:42 3/19/99 -0500, Roberto Safora wrote: >I put a amd k6-2/350 cpu in a Shuttle hot 591p mobo. >From time to time when pc starts you can red a message "IOS device >error initializing. windows protection error. Restart your pc"... >The same thing happens in more than 15 PCs If you are using Win95 OSR2, this is a known problem. See <http://www.amd.com/products/cpg/k623d/win95_update_k6.html>. "When you are starting Windows 95 OSR2, OSR2.1, or OSR2.5 on a computer with an AMD-K6-2 processor running at speeds of 350 MHz and above, you may receive one of the following error messages: Device IOS failed to initialize. Windows Protection Error. You must reboot your computer. The first error is a result of a divide exception in IOS.VXD, the second is due to a similar error within ESDI_506.PDR or SCSIPORT.PDR. This observation is caused by a software timing loop that is sensitive to processor frequency, and is not a processor erratum. This DOES NOT occur with Windows 98 or Windows NT."... You can download the following fix: <http://support.microsoft.com/download/support/mslfiles/Amdk6upd.exe>. Regards, Bill PCBUILD only works if you contribute. Send your messages to be posted to: [log in to unmask]