1. A method for preventing hacker attacks and virus infection in a computer system comprising: prompting a user to perform a switching allowing temporarily writing to a write-protectable storage area, wherein a respective physical write-protection mechanism comprises a switching means which is exclusively operable from outside of an operating system of said computer system, storing security-relevant information into said write-protectable storage area, prompting a user to perform a manual switching to restrict writing to said write-protectable storage area, thus resulting in generating a write-protected storage area, restricting any write access to said write protected storage area in response to said manual switching during further runtime of said computer system.