System Service Failures

[Chanda]

I am having problems with Vista. I've tried formatting and re-installing. I ran a Reliability and Performance check and it shows there are two abnormally stopped system services. These are the messages on the report:
Display Name: ReadyBoost
Exit Code: 1067
Service Name: EMDMgmt
Path: C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted
Service Code: 0
Started: False
State: Stopped
--and--
Display Name: Superfetch
Exit Code: 1067
Service Name: SysMain
Path: C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted
Service Code: 0
Started: False
State: Stopped

Does anyone know if there's a way to fix this problem?

Oh, I'm running Windows Vista Home Basic with SP1 on an iMac, 2.66 processor, 4G ram (if any of that information helps).