IPsec Policy Agent
Enforces IPsec policies created through the IP Security Policies Snap-in or the command-line tool netsh ipsec. If you stop the service, you may experience network connectivity issues if your policy requires that connections use IPsec. Remote management of the Windows Firewall will not be available if the service is stopped.
The IPsec Policy Agent retrieves policy information from Active Directory, or from the local registry, and distributes it to other components that make use of the policy information. The typical home user does not need this service, and can safely disable it. Enterprise users, or those that use a VPN will want to leave this one as is.
For a start, I do not access my PC remotely, and it is a standalone system. I operate behind a NAT router, and wonder if the address translation will suffer at the PC end. I can't imagine how, but am just curious.
Oh, in case anyone is interested...
Creative Audio Service is necessary if you have a creative card...you don't see the true effects of some disabled services until a full restart is performed; a log off doesn't do the business.
Print Spooler (Spoolsv) should be left as 'Automatic'. I thought that changing to 'manual' would mean it would run when either a printer was switched on, or a print job run, but disabling that service actually means that Windows has no printers available (they reappear when the service is back up). Leave running.
IP Helper - Only necessary for IPv6 people. It allows IPv6 to run through IPv4 networks. Disabled.
Computer Browser - Not necessary for standalone setups.
Distributed Link Tracking Client - For linking to NTFS files across networks - Not needed in standalone setups or in setups with no NTFS drives.
Function Discovery Resource Publication - In short, allows other PCs on a network to discover your PC...not needed for standalone setups.
HP CUE DeviceDiscovery service (HP printer/scanner/copier only) (hpqddsvc) - As far as I can see, this is the ethernet part of the HP connection to my printer. The other process I have (hpqcxs08) is, as far as I know, essential for HP multi-function devices.
Internet Connection Sharing - Not needed on standalone setup.
Readyboost - http://en.wikipedia.org/wiki/ReadyBoost - Not needed in my system...recommended for slow setups with little RAM.
That'll do for now...no point in listing all of em yet.
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