Windows 7 very slow start up and sluggish general performance

Hi all,

My Lenovo G570 (i5, 4GB ram) running on Windows 7 Home Premium had been running great up until last night...
It's now booting up really slowly and once it eventually has booted up it runs very slowly too (everything seems to be in slow motion i.e. if I click "computer" it opens up very slowly, almost like it's stuttering). I also can't play audio / video files (the files open but playback is broken / chopped up).
I've also noticed that one of my USB ports is no longer working (external hard drive lights up for a second when I plug it in, but then goes off and the drive is not recognised).
Browsing the net (Chrome) seems to be fine though, streaming audio and video is ok.

I've tried disabling all start up options when booting up, booting in Safe Mode with Networking, CHKDSK, virus scan, malewarebytes scan and a system restore to a few days ago but haven't had any joy.

I'm hoping someone on here might have a few suggestions for me to try.
Thanks!

Thanks very much for your response. I'll do as suggested and post a screenshot of the results a little later this evening.

Cheers.

Hi again...please see the attached screenshot. It doesn't mean much to me so any advice would be much appreciated.

Cheers.

Here's the data log info - encase that helps.

Hi, thanks for your response and help.

CPU usage seems fine according to Resource Monitor.

Memory seems ok too (no individual applications using 300-400mb of RAM) although it does indicate that I'm using about half of my installed 4gb RAM - which does surprise me a bit (screenshot attached).

I hadn't downloaded anything before it started acting up - I had been streaming some sport and then closed the browser and shut the lid of the laptop, came back about an hour later and the one USB port wouldn't work, so I thought a restart would help, which is when I noticed the slow boot up speed and poor windows performance.

Thanks again.

Yes, when I close the lid it hibernates, but it's never been an issue before. Thanks for the suggestion, will try it this evening.