Since PnP ISA/EISA Bus Driver is a kernel mode driver, its startup might be configured depending on installed hardware. Changing its startup configuration might cause hardware issues. In the table below you can see how it is configured on my system, but your default settings might differ from mine.
The PnP ISA/EISA Bus Driver service is a kernel mode driver. If PnP ISA/EISA Bus Driver fails to load or initialize, the error is logged and the computer attempts to restart with the LastKnownGood configuration. If the LastKnownGood configuration fails, Windows Vista startup also fails, and the boot process halts with a Stop error. If you disable this service, Windows Vista will fail to start. Do NOT change this service startup configuration if your computer is working.
I'm trying to find where the BCD (Boot Configuration Data) store is actually stored in windows vista/7. This is the information which in previous versions was stored in the boot.ini file (usually located in C:).
From Windows Vista forward, Microsoft replaced NTLDR with bootmgr.exe and winload.exe. Instead of recording the \\Windows directory location in boot.ini, post-XP systems read startup information directly from the boot configuration database (BCD); this data can be read and modified by using the bootcfg utility. 1e1e36bf2d