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Windows 7 lags every few seconds
Hi all,
I've been having a few problems with my Windows 7 laptop the past few months. Every few seconds it seems to lag- the screen will just freeze for about a second and then it will go on working as normal. For example, while I'm typing this, every so often the screen freezes and then suddenly anything I typed while it was frozen will appear at once. Or some of the visual effects of Windows 7 might be delayed, like if I hover the cursor over an icon in the taskbar, it might not light up immediately and there'll be a delay in actually clicking on it. It happens while playing games too. Everything will stop briefly, then continue. Today I noticed, while playing Final Fantasy VII, that these freezes seem to happen just before a sound effect is loaded that hasn't been used recently, like the sound of a particular attack landing. I don't know if that means anything or is something random, but I thought I'd mention it all the same.
I've had the computer since December 2009, and for the first year or so I had problems with BSODs, until I eventually I brought it back to the shop, and after a few months they figured out the problem and replaced the CPU. Since January 2011, it has been working fine, until these laggy problems started around August or September 2013.
These are my specs:
HP G61 Notebook PC
Windows 7 Home Premium 64-bit
Pentium Dual-Core CPU, T4300 @ 2.10 GHz
4.00 GB RAM
I've looked at dozens of similar threads and tried quite a few things to try to fix the problem. So far:
I've used Disk Cleanup and CCleaner to clear out temporary files, system files etc. and while this has freed up several GBs of memory it hasn't seemed to make a difference. (I didn't use the registry cleaner option in CCleaner, as I was a little unsure about what this would do.) While CPU usage is now down to below 20% usually, it hasn't seemed to fix the problem.
I've run the chkdsk command, which took almost three hours, but this has made no difference either.
I've used Sfc /Scannow, which found no problems.
I've checked quite extensively for malware. Malwarebytes found 4 dodgy files, which I deleted, but it made no difference. Scanning with Norton didn't find anything else, and another scan from Malwarebytes found nothing.
I then heard Norton was quite a CPU hog, and so uninstalled it and replaced with avast, but this hasn't helped either.
I've used msconfig to disable some of the startup programs and services, but again this hasn't made any difference to the problem.
I'm not sure what else to do, other than a full system restore. I've noticed other threads asking for the logs from the event viewer so I've included them here, if that helps.
Is there anything else I can do at this point? The computer is still usable, I can live with it, but it's an extremely irritating problem and I would be so grateful for any help in finding a solution. If you need any more information just ask.
Thanks in advance,
David