CPU running 100%

Hi,
See what happens if you disable the update system
Go to windows updates and change settings
Switch to Never check for updates/ save and restart the machine.

If it continues see if these services are still running
Click Start and type in the search box
services
Click the suggestion or the enter key
Double click the listings to get the options to change them.
Background intelligent transfer services
Cryptographic
Windows installer
Windows update

When manually installing updates you need to switch your update settings to Never check for updates and restart the machine first.

Make sure KB3020369 is installed if not manually install it,
Win-7 32 bit
https://www.microsoft.com/en-us/down....aspx?id=46827
Win-7 64 bit
https://www.microsoft.com/en-us/down....aspx?id=46817

Then manually install KB3172605
https://support.microsoft.com/en-us/kb/3172605
Win-7 32 bit,
https://www.microsoft.com/en-us/down....aspx?id=53335
Win-7 64 bit,
https://www.microsoft.com/en-us/down....aspx?id=53332

After switch your windows update settings back to what you had prior and manually check for updates and the rest should show up shortly.

Hi,
Adding more ram will of course help startup.... but not cpu usage issues

Did you see if the 2 updates were installed and if not did you install them ?
That will do the most for the high cpu usage.

Reset will just make matters worse because that would wipe out all updates you do have installed and force you to manually install the same 2 updates I already posted :)

An ssd will improve many things but not an existing high cpu usage issue.

You're welcome to upgrade any hardware you want both were good things to do but neither will fix your high cpu issue :)