Another little useful utility to use is StartupCPL which gives back some startup control.
http://www.mlin.net/StartupCPL.shtml
Works great!
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Has there been listed services which can safely be turned off?
Here are some of the services you may be able to deactivate without trouble.
Alerter
Notifies selected users and computers of administrative alerts. This is not
required on standalone workstations or networked systems where administrative
alerts are not used.
Task Scheduler -- This schedules weekly defrags and the like. Unless you are too lazy to start that kind of stuff up on your own, you can probably set this one to Manual.
Uninterruptible Power Supply -- This service manages your UPS -- if you don't have one, set it to manual or disable it entirely.
Indexing Service
Used to index files on disk for faster searches. If this isn't a feature you
don't use often, you can disable it.
IPSEC Policy Agent
Used only for IP-based security features, which is useful if you're doing things like VPN connections to or from the computer in question. If you're not using IP security, this can be turned off without problems.
Messenger
Sends and receives messages transmitted by administrators or by the Alerter
service. If you turn off Alerter, you can turn off Messenger as well.
Remote Registry Service
This allows your system's Registry to be remotely edited by a trusted user.
If this isn't something your see happening on your system, hit the OFF switch for this service.
Removable Storage Manager
It's only useful if you're using removable storage (as the name would indicate). If you have no Zip, Jaz, optical disk or tape drives in your computer, you can disable this without trouble.
Telephony
Governs TAPI support for programs that use it, such as terminal programs or
programs that use IP-based voice connections. If you don't use a modem, you
can turn this off without losing anything.
I also shutdown the computer browser and the server as my machine is not networked. You must also set the start setting to manual or disabled else 2000 will start the service up the next time you reboot.
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LANMAN error fix: Event 2506 When Starting Windows 2000
Locate the IRPStackSize value under the following registry key: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Lanmanserver\Parameters\IRPStackSize
On the Edit menu, click DWORD.
Type 11, and then click OK.
Quit Registry Editor, and then restart Windows 2000.
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To fixed damaged system files:
SFC /Scannow
At dos prompt, type the above and enter. SFC will fix all damaged system files. If running SP-1 you might wish to reinstall the service pack.
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Sorry if any of this is redundant.