If security center service is missing or damaged, or antivirus software is not installed and current, Outlook 2010 will not allow sync with other apps without prompt. Eg. Commit.
You could try adding the following key to the registry:
In this key add the following value:
ObjectModelGuard, DWORD =2
The values 0, 1 and 2 correspond to the options in the Programmatic Access Security settings in the Trust Center.
0 = Warn if Anti-Virus is out of date (recommended)
1 = Always warn
2 = Never warn
No printers show up in the printer section of control panel. This is a result of the print spooler crashing. if you go in and manually restart the print spooler it runs until you try to do anything related to the printer then crashes again.
Usually this is the result of corrupt print drivers (possible virus infection causing the corruption. Make sure to run a quick malware scan). You may need to uninstall print drivers completely – including the registry entries.
If it is a local printer (My Computer), go to the following registry keys and delete the respective entries:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlPrintEnvironments Windows NT x86 DriversVersion-2
If it is a network printer (network printer server or ), go to the following registry keys and delete the respective and entries:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlPrintProviders LanMan Print ServicesServersPrinters
After the registry edit, you need to stop and restart the spooler service. At this point, you’ll be able to reinstall the printer driver correctly.