This issue only affects some customers working on IT-managed company computers running Windows XP and is related to custom security policy settings. This should not happen on a standard install of Windows XP.
Do not attempt this solution unless the description here matches the log file "C:\Windows\setupapi.log." This only applies to Windows XP.
Check if the driver install for all Saleae products is failing and the setupapi.log file contains these lines:
"#E008 Setting registry value HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\svchost\WudfServiceGroup"
"#E033 Error 5: Access is denied"
"#E065 Parsing AddReg section [WudfSvc_Registry] in "c:\6da69e39dcd652f0f13cc7d549b9\wudf_update.inf" failed. Error 5: Access is denied"
"#E033 Error 5: Access is denied". Then the issue is most likely a missing registry key. Please try adding a key: "WudfServiceGroup"