Oracle Database Discussions

Hi, I encounter an error when installing Oracle 9.2.0.6 client on Window 2000 Professional machine. After I execute setup.exe about 3-5 secs, an error message is showed which displays "Error in writing to directory c:\docume~1\....\Temp\OraInstall2009-04-18_01_08_20PM. Please ensure that this directory is writable and has atleast 32MB of disk space.Installation can not continue.".

I tried a number of testings and am sure that the cause of this error is not like the surface desription of the message. The error is no reaseon triggerred by permission or disk space. In addition, the timing of the error happens is when the installation copy temp files to my OS temp directory. I have further googled much information and did some tries but still have no idea how to solve it. Can anyone give instrcution to solve this problem?

Thank in advance.