I mask my desktop?

computer lab at my university Evry sites like Orkut, YouTube, yahoo gtalk msgnr everything is blocked. I know I can open these sites using proxies. but my system administrator each time seeing all students back your computer monitor. It has a software style. so if I can open these sites using proxy servers that any blockage also. any software utility that is available to hide my monitor my system administrator. please help me

You can not, you know, break the rules. There is a reason why web sites are blocked.

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