Hi Abdul,

If your WiFi is working slow, then there are many reasons for it like the below ones:

Reason 1:Local network is overloaded

Reason 2:Slow DNS responses

Reason 3: Unknown downloading
Most modern applications are constantly on the lookout for updates and upgrades from the Internet. These update processes can run in the background so may not be visible. Some updates are small but things like operating system service packs can be greater than 1GB in size.

Reason 4: ISP throttling
Some internet service providers have implemented a policy where they will slow down an Internet connection if something like Bittorrent is detected. This is designed to frustrate people from downloading data via peer-to-peer networks.

Please cross check that you are not having the internet issue due to the above reasons.

I would suggest you to try the below fixes and see if it works for you:

Fix 1: Unplug wires
Try unplugging your router and modem internet cables from the wall for 5 minutes. Sometimes this can improve your connection with surprising effectiveness.

Fix 2: Tweak Internet Options
First step in speeding up your slow internet connection to tweak your internet options. To launch the internet options utility follow the the direction below:

• Click Start
• Click Control Panel
• Double Click Internet Options
• Click Settings under Browsing History

The task here is to make your web cache as small as possible. The less disk space your reserve for your temporary files is less data that your computer needs to search through. This action can easily award you a faster connection on the net.

• Reduce the Disk Space to Use to the minimum recommended amount or as low as your desire.

Fix 3. Change your WiFi channel
Your router can choose from 13 channels to pump out your WiFi signal. The idea is that other routers in the area can spread out across the channels so as to prevent them from competing with one another. But sometimes routers cluster on one channel and this can slow things down.
If your internet is suddenly a lot slower it may be because your neighbor has just got a new router and is on the same channel as you.
The exact means of changing the channel varies from router to router.

Click Settings, then Wireless, find Channel Selection and choose a new channel from the drop down options – the channels you are advised to use are 1, 7 and 13.

Fix 4: Delete cache from your browser

Deleting your web cache is a good way to speed up a slow internet connection. These files take up valuable resources that could be used to for a better net surfing experience. Remember that while you are online many files in the web cache are active.

Cookies are loaded in your browsers and constantly update themselves. Also your computer will search through the temp files to match the latest version of a web page. So, by clearing the web cache you cut down on the work your PC needs to do thus speeding up your slow internet connection. Remember to shutdown the browser when deleting the cache. Because what files are open will not be deleted. Here how to delete your temporary internet files.

Manual steps to erase your temporary internet files.

• Quit Internet Explorer, Firefox, or any other web browser
• Click Start, click Control Panel, and then double-click Internet Options.
• On the General tab, click Delete Files under Temporary Internet Files.
• In the Delete Files dialog box, click to select the Delete all offline content check box , and then click OK.

Fix 5: Keep your WiFi private
It might be that your WiFi is open and someone else is cheekily using your internet and clogging up your bandwidth. Time to turn off the tap. To set up a password so that only authorized devices can use your WiFi click Start on your computer, then choose All Programs and launch Internet Explorer or another web browser.
Enter the address of your router into the browser’s address bar (this is the number listed on the router and its instruction manual), then press Enter. To change the password, click on the Administration or Settings tab (this may vary from router to router). Then set up a password for your router.

I hope this helps in resolving this issue.

Regards,
Lokesh