how do I download print spooler file 'spoolsv.exe' for Acer Aspire One with windows XP

I see...

Click Start, Run and in the box enter:

cmd

Click OK to open a Command Prompt window.

I suggest you first take a look at what the Print Spooler Service thinks it depends on right now by querying the Print Spooler Service by entering this command from the Command Prompt window::

sc qc spooler

What do you see under DEPENDENCIES? 

Do you see the rpcss Service and some unnecessary Lexmark Service?

To configure the Print Spooler Service to depend only on the rpcss Service (rpcss = Remote Procedure Call (RPC) Service) enter the following command (including the important space after the equals sign):

(Do not forget the space after the equals sign)

sc config spooler depend= rpcss

Query the Service again from the Command Prompt to see what it looks like now by entering:

sc qc spooler

The query should look like this with only the rpcss listed in the DEPENDENCIES field:

[SC] GetServiceConfig SUCCESS

SERVICE_NAME: spooler
        TYPE               : 110  WIN32_OWN_PROCESS (interactive)
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\WINDOWS\system32\spoolsv.exe 
        LOAD_ORDER_GROUP   : SpoolerGroup 
        TAG                : 0 
        DISPLAY_NAME       : Print Spooler 
        DEPENDENCIES       : rpcss 
        SERVICE_START_NAME : LocalSystem

Type 'exit' to close the Command Prompt window.

That looks pretty normal to me, so reboot and see how your Print Spooler Service behaves now.