How to Fix Slow Performance Issue after upgrading to Windows 8.1

Posted by Britt Duncan - July 7, 2014

Various PC users may find the computer turns sluggish, inactivate and slow after they have Windows upgraded to Windows 8. Due to incompatible issues of Windows 8.1 configuration and the installed programs, file corruption or other problems, the newly installed Windows may brings various PC annoyances to you, especially slow PC performance. Therefore, in this article, every possible reason will be examined and according resolutions will be provided.

Use the Windows Built-in Tool to Troubleshoot

1. Click Win + W keys together to bring up search box, type troubleshooting in the search field and initiate a new search. Then, select Troubleshooting from the search results.


2. After the Troubleshooting window open up, move to left pane, click View all to see the full list of troubleshooting tools. Choose System Maintenance among those tools.



3. System Maintenance wizard will appear automatically, click Advanced and then tick the check-box before Apply repairs automatically. Then, click the Next button.


Afterwards, a scan will initiate instantly. Once it detects any problems that causes abnormal performance of the program, the tool will begin to repair without manual interference.


Remove Useless Startup Items

1. Right click the Taskbar and select Task Manager. After it appears, click More details. Afterwards, go to Startup tab.



2. Select the program or programs that are not necessary to launch alongside with Windows though you may need them from time to time. But, you can fetch and open them in need.

3. Right click on the selected program or programs one by one and click Disable button.


Bulky startup programs may be another reason being blamed for slowing down the Windows from the boot up process. Therefore, you can cut off Windows 8.1 boot-up time by disabling programs that are not essential to system performance or are not vital to your daily work.

Disk Defragmentation

1. Tap Win + Q keys simultaneously and put in defragment. Select Defragment and optimize your drives from search results.


2. Choose a drive by highlighting it and click the Analyze button behind it to check whether there are any fragmented data. Once it does, the tool will show in the current status. Subsequently, hit Optimize button to start defragmenting.


3. Perform the same operation for other drivers on the computer to defragment all fragmented data.

Tons of fragmented data may still exist or be generated during the update process. By defragmenting all drivers, the machine turn more efficient in accessing data and therefore ultimately boots up the computer.

Disk Cleanup

1. Press Win + I keys together to display search box, put disk cleanup in the search box and select Free up disk space by deleting unnecessary files from search result.


2. Designate a drive in the Drive Selection session and hit OK. The Disk Cleanup tool will start to scan and calculate how much space is need to be clean up.



3. After the scan completes, decide what sort of files you wish to delete, for instance, download program files, temporary Internet files and more. Tick the check-box before the types of files you want to delete and click OK. Windows will prompt you to confirm the deletion, click Delete files once you make up your mind.




Disk Cleanup is a Windows built-in tool that assists you in deleting useless files and freeing up the storage space. This helps to facilitate the file searching process and speed up the operation of installed Windows 8.1.

In conclusion

There are additional facts that may affect the PC performance. Among them , one of the most common and tricky one is malware. Some malicious programs may reduce the Internet speed and implant bulky processes. Therefore, aside from going through the mentioned procedures above, make sure you have a check for harmful infections as well once you are annoyed by sluggish computer performance in Windows 8.1.

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TESTED:  21 Feb