SP4 cannot install as UNIDRV.HLP is in use

[Bijoy]

I am not able to install SP3 or SP4. There is a message
that says that UNIDRV.HLP is in use by some application.
Can someone give any help on this please.

 

[Joseph Conway [MSFT]]

UNIDRV is updated as part of SP3. Have you tried just stopping the spooler
service until SP3 is installed? Or pausing your current printing software?