Hi, I?ve critical problem. I have a printer HP 1020 which is installed with my pc. And we have 10 PC in my local network. We use above printer share basis. But problem is when some one (without my pc) try to send print command from their PC before complete print command they can?t do anything from their PC. Like MS Word document open or edit, Email reading or editing nothing can?t do. We install above printer in another local network for test. But we can?t see any problem above like that.

The spool service basically holds what you want to print in memory and print it while you can do other stuff..
Check you spool settings here:
Although you can control whether to use spooling or not, you'll typically want to spool documents you send to printing. Spooling documents expedites the printing process, and allows the application that sent the document to release control back to the user much faster this link will show you the settings you can select but the real settings will take place inside your printer properties.
http://technet.microsoft.com/en-us/library/cc739118(WS.10).aspx
Hp 1020 spooler settings, unable to find the specific one but i believe when you go into the options just follow the steps provided in the link with similar images and try selecting a different spooler option, this can indeed affect what's happening with the printer versus the systems...
http://technet.microsoft.com/en-us/library/cc722526.aspx