Recent upgrade from Vista Home Premium to Win 7 Home Premium installed. Now getting periodic blue screen showing "vsdatant. sys".Attempts to use System Information tools unsuccessful-says "Cannot collect information. Cannot accessthe Windows Management Instrumentation Software. Files may be moved or missing." Attempts to contact MS tech support unsuccessfull ; site does not recognize Product Activation ID which validated OS on installation. Advice as to how to correct needed.

Hello, Some malware comes themselves as vsdatant.sys, particularly if they are located in c:\windows or c:\windows\system32 folder. or old Vista OS uninstalled incompletely. Did you image your system over to another partition/drive before installing W7 over your prior Windows install. Sachin Shetty| MCP|MCTS|MCITP| Please remember to mark the replies as answers and Vote as helpful if they help and unmark them if they provide no help.Thank you in advance.

Hi, Vsdatant.sys can be a component of ZoneAlarm. According to my research, there are many BSoD causes were caused by ZoneAlarm. If you do have ZoneAlarm installed, I would like to suggest you uninstall it to check the result. Regards,Arthur Li - MSFT

Vista Image file for both C and D (recovery)drive saved on external drive. Rather than doing recovery of Vista and a new upgrade attempt to Win 7- will a clean install work? Had nothing but trouble with Vista; wonder if a clean install and reinstall of programs will be betteer. Appreciate your help-and quick response!

Thanks-will try if other efforts fail.

Hi, I would like to confirm what is the current situation and have you tried to uninstall ZoneAlarm if you have it installed? Regards,Arthur Li - MSFT

Thanks for the follow-up. Deleted Zone Alarm and the reinstalled to see if it silved the problem. It didn't!This is the error report- Log Name: Microsoft-Windows-Diagnostics-Performance/Operational Source: Microsoft-Windows-Diagnostics-Performance Date: 5/19/2010 4:59:45 PM Event ID: 100 Task Category: Boot Performance Monitoring Level: Error Keywords: Event Log User: LOCAL SERVICE Computer: Pop-PC Description: Windows has started up: Boot Duration : 135072ms IsDegradation : false Incident Time (UTC) : ‎2010‎-‎05‎-‎19T20:56:45.734000400Z Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="Microsoft-Windows-Diagnostics-Performance" Guid="{CFC18EC0-96B1-4EBA-961B-622CAEE05B0A}" /> <EventID>100</EventID> <Version>2</Version> <Level>2</Level> <Task>4002</Task> <Opcode>34</Opcode> <Keywords>0x8000000000010000</Keywords> <TimeCreated SystemTime="2010-05-19T20:59:45.229195100Z" /> <EventRecordID>2412</EventRecordID> <Correlation ActivityID="{00000100-0000-0001-6564-C1CA95F7CA01}" /> <Execution ProcessID="1976" ThreadID="1988" /> <Channel>Microsoft-Windows-Diagnostics-Performance/Operational</Channel> <Computer>Pop-PC</Computer> <Security UserID="S-1-5-19" /> </System> <EventData> <Data Name="BootTsVersion">2</Data> <Data Name="BootStartTime">2010-05-19T20:56:45.734000400Z</Data> <Data Name="BootEndTime">2010-05-19T20:59:43.747192500Z</Data> <Data Name="SystemBootInstance">44</Data> <Data Name="UserBootInstance">41</Data> <Data Name="BootTime">135072</Data> <Data Name="MainPathBootTime">90972</Data> <Data Name="BootKernelInitTime">24</Data> <Data Name="BootDriverInitTime">532</Data> <Data Name="BootDevicesInitTime">5181</Data> <Data Name="BootPrefetchInitTime">40275</Data> <Data Name="BootPrefetchBytes">480366592</Data> <Data Name="BootAutoChkTime">0</Data> <Data Name="BootSmssInitTime">30268</Data> <Data Name="BootCriticalServicesInitTime">1568</Data> <Data Name="BootUserProfileProcessingTime">377</Data> <Data Name="BootMachineProfileProcessingTime">1058</Data> <Data Name="BootExplorerInitTime">46177</Data> <Data Name="BootNumStartupApps">9</Data> <Data Name="BootPostBootTime">44100</Data> <Data Name="BootIsRebootAfterInstall">false</Data> <Data Name="BootRootCauseStepImprovementBits">0</Data> <Data Name="BootRootCauseGradualImprovementBits">0</Data> <Data Name="BootRootCauseStepDegradationBits">0</Data> <Data Name="BootRootCauseGradualDegradationBits">0</Data> <Data Name="BootIsDegradation">false</Data> <Data Name="BootIsStepDegradation">false</Data> <Data Name="BootIsGradualDegradation">false</Data> <Data Name="BootImprovementDelta">0</Data> <Data Name="BootDegradationDelta">0</Data> <Data Name="BootIsRootCauseIdentified">false</Data> <Data Name="OSLoaderDuration">3196</Data> <Data Name="BootPNPInitStartTimeMS">24</Data> <Data Name="BootPNPInitDuration">5206</Data> <Data Name="OtherKernelInitDuration">6892</Data> <Data Name="SystemPNPInitStartTimeMS">12050</Data> <Data Name="SystemPNPInitDuration">507</Data> <Data Name="SessionInitStartTimeMS">12606</Data> <Data Name="Session0InitDuration">26857</Data> <Data Name="Session1InitDuration">735</Data> <Data Name="SessionInitOtherDuration">2676</Data> <Data Name="WinLogonStartTimeMS">42875</Data> <Data Name="OtherLogonInitActivityDuration">484</Data> <Data Name="UserLogonWaitDuration">663</Data> </EventData> </Event> Any advice will be appreciated.

This eventlog has nothing to do with missing files. It shows you, that your Windows takes 135seconds to completely boot."A programmer is just a tool which converts caffeine into code" CLIP- Stellvertreter http://www.winvistaside.de/

Andre, Thank you for your response. My latest post was responding to Arther Li's question related to blue screen error-not to oriiginal post referring to missing files. That problem was corrected by re-enabling process for Windows Management Instrumentation Software. Still getting blue screen errors and thought performance monitor errors had something to do with it.

If you get BSODs, upload the dmp files from your Windows\Minidump folder to your Skydrive (copy the dmp files first to your desktop, otherwise you can't upload them) and post a link here, so that we can look at the dumps."A programmer is just a tool which converts caffeine into code" CLIP- Stellvertreter http://www.winvistaside.de/