I have an older desk top computer running Windows 7. The CPU is an Intel Core 2 Duo (E7200, 2.53 GHz) with installed RAM of 2 GB. Total disk space is 700 GB, but disk is partitioned into 100 / 600 - with C drive currently loaded with 52 (of 100) GB. Only recently I am experiencing a problem of where the CPU begins processing large amounts of data and effectively using nearly all of the 2 GB RAM - making it virtually impossible to perform other tasks on the computer - (such as internet, opening other progams, etc.) If also hinders the process of opening 'task manager' to close programs. This problem exists most days when I turn the unit on. If I let the problem persist for a time (30 minutes) and then re-boot, often it no longer shows this problem. Occasionally it will sit idle for some time - and then again begin processing data. I've checked scheduled tasks (defrag and back up) but they are not programmed. I've tried (a) disconnecting internet, (b) stopping Google Chrome - (while experiencing the problem) - but this did not affect (stop) the activity on the CPU. (I cannot stop the anti-virus during the process.) This problem DOES more or less coincide with installation of new version of ESET anti-virus program. (Following installation the program scanned the computer for 4 1/2 hours.) I did disable the ESET program (via 'msconfig', services) ... and the problem did not occur for that particular instance. (I was concerned about leaving the system unprotected, so I've turned it back on.) The concerns I have - (and points I'll appreciate it if someone can comment on) - are: 1. Does this sound like it might be a virus? 2. Does it sound like it may be the ESET anti-virus program? (If so, perhaps I should un-install this and use an alternate program.) 3. Is there a way I can identify what the process is that is tying up the CPU? (perhaps a software tool). (I have used Cntl+Alt+Del to see the processes listed but have not noted anything - other than the fact that I cannot stop the anti-virus program.) 4. I realize 2 GB RAM isn't much - and perhaps it is insufficient for Windows 7. (??) The computer, however, seemed to be working well the past couple of years. This problem with the 'data processing in CPU' is new. Any comments are welcome. Thanks in advance.