1) Create a Restore Point using System Restore
2) Create a Repair disc: Win7
- Go to Start...All Programs...Maintenance...Create a System Repair Disc Win8
- Press "WIN" and "R" to open the Run dialog...type "RECDISC" (without the quotes) and press ENTER
3) Test the System Repair disc to make sure that you can get to the System Restore entry when you boot from the disk (you may also want to try actually using System Restore to make sure that it works)
4) Download this free program (Autoruns for Windows
) and use it to disable any instances of xpc4drvr.sys that are starting (or any other XiLinx entries) (DO NOT DELETE - only disabled by removing the checkmark in the left hand column)
5) Check in Device Manager (to include showing hidden devices from the View menu item) and ensure that any instances of xpc4drvr.sys (or any other XiLinx entries) are "Uninstalled" (DO NOT DISABLE THESE).
6) Check in the Services applet (services.msc) to be sure any instances of xpc4drvr.sys or any other XiLinx entries are disabled.
7) Go to C:\Windows\System32\drivers and rename the xpc4drvr.sys driver to xpc4drvr.BAD
In the event that the system doesn't boot:
1) Boot from the System Repair disc and use the Command Prompt option to rename xpc4drvr.BAD to xpc4drvr.sys
2) Boot from the System Repair disc and use the System Restore option to restore the system to a point before the changes were made.