It sounds like wmi. This runs every 10-20 seconds and if it has a bad entry it can eat a lot of CPU.
Scroll down to Windows Management Instrumentation and right click on it and Stop the service. Then play your game and see if the lag is still present.
IF the lag goes away then try rebuilding the WMI Repository
If that's more than you want to try then you can lket Windows Reapir All In One do it for you:
Download it and save it then run it.
You can skip to step 4 or 5 where it gives you the same picture as in the above link.
Make sure only this item is checked before hitting Start:
Reboot when done
If it's not WMI causing the problem then:
Open an elevated command prompt:
If you open an elevated command prompt it will by default open in c:\Windows\system32
Once you have an elevated command prompt:
Type(with an Enter after each line):
DISM /Online /Cleanup-Image /RestoreHealth
(I use two spaces so you can be sure to see where one space goes.)
This will take a while to complete. Once the prompt returns:
Reboot. Open an elevated Command Prompt again and type (with an Enter after the line):
This will also take a few minutes.
When it finishes it will say one of the following:
Windows did not find any integrity violations (a good thing)
Windows Resource Protection found corrupt files and repaired them (a good thing)
Windows Resource Protection found corrupt files but was unable to fix some (or all) of them (not a good thing)
If you get the last result then type:
findstr /c:"[SR]" \windows\logs\cbs\cbs.log > \junk.txt
Hit Enter. Then type::
Copy the text from notepad and paste it into a reply.
After you finish SFC, regardless of the result:
1. Please download the Event Viewer Tool by Vino Rosso
and save it to your Desktop:
2. Right-click VEW.exe and Run AS Administrator
3. Under 'Select log to query', select:
4. Under 'Select type to list', select:
Then use the 'Number of events' as follows:
1. Click the radio button for 'Number of events'
Type 20 in the 1 to 20 box
Then click the Run button.
Notepad will open with the output log.
Please post the Output log in your next reply then repeat but select Application. (Each time you run VEW it overwrites the log so copy the first one to a Reply or rename it before running it a second time.)
Get Process Explorer
Save it to your desktop then run it (Vista or Win7+ - right click and Run As Administrator).
View, Select Column, check Verified Signer, OK
Options, Verify Image Signatures
Click twice on the CPU column header to sort things by CPU usage with the big hitters at the top.
Wait a full minute then:
File, Save As, Save. Note the file name. Open the file on your desktop and copy and paste the text to a reply.
Get the free version of Speccy:
Latest Version button - Do NOT press the large Start Download button on the upper left!)
Download, Save and Install it. Tell it you do not need CCLEANER. Run Speccy. When it finishes (the little icon in the bottom left will stop moving),
File, Save as Text File, (to your desktop) note the name it gives. OK. Open the file in notepad and delete the line that gives the serial number of your Operating System.
(It will be near the top, 10-20 lines down.) Save the file. Attach the file to your next post. Attaching the log is the best option as it is too big for the forum. Attaching is a multi step process.
First click on More Reply Options
Then scroll down to where you see
Choose File and click on it. Point it at the file and hit Open.
Now click on Attach this file.