Hi,

You can try changing the properties of the network card in Device manager. Below are the steps:

• Click on 'Start' and right click on 'Computer'.
• Click on 'Manage' and click on 'Device Manager'.
• Go to 'Network adapter' and right click on the wireless card driver and click on 'Properties'.
• Click on 'Advanced' and select “Channel” and change it to '11' on the right side.
• Select 'Roaming aggressiveness' and change is to 'Highest'.
• Click on 'Apply' and then 'Ok'.
• Check if the issue is fixed.

If the above steps do not fix the issue, you can try the below steps:

Boot your system in 'Safe Mode with Networking':

• Restart your system and keep tapping 'F8' as soon as the Dell logo appears.
• Highlight 'Safe Mode with Networking' using up and down arrow keys and press enter.
• Check the functionality of the Internet in 'Safe Mode with Networking'.

Keep me posted. Please reply for any further questions.

Thank you for answering my question,

i did first step and it didn't help...but i entered safe mode with networking and it worked great...if had full signal and it wass fast....also ping was something like 40ms...

Hi,

Thank you for the quick reply. Since the system is working fine in 'Safe mode with Networking', there is a possibility that the anti-virus installed on your system is causing this issue. Which anti-virus are you using on your system? You can try disabling the firewall of the anti-virus and check if that makes any difference. Alternatively, create a new user account and check if that works fine:

• Click on 'Start' and type 'User account' in search menu.
• Click on 'User Accounts' in the search list.
• Click on 'Manage User Accounts'.
• Click on 'Manage another account'.
• Click on 'Create a new account'.
• Type in the name and select 'Administrator'.
• Click on 'Create account'.
• Log off and log in into the new user account.
• Check if the wireless works fine.

Keep me updated. Please reply in case you have any further questions.

Ok, at the beginning I didn't have any antivirus and it didn't work then i instaled avast antivirus and it still didn't work, now i uninstaled antivirus and i used Malwarebytes Anti-Malware to scan pc (all ok). I also created another account and it didn't help :((  is it possible that driver is bad? if i had bad drive would it still work in safe mode?

Thank you!

Hi,

I appreciate your efforts. Had the driver been corrupted, system would have behaved the same way in 'Safe Mode with Networking'; the same goes for a bad hard drive. I will recommend you to restore your system back to factory settings:

Note: PC restore will lead to data (pictures, documents, programs, music) loss. Please perform a data backup prior to this step. Please disconnect any external peripherals (printer, scanner or any USB device) as well.

 To perform PC restore:-

1. Restart PC, keep tapping 'F8' as soon as the Dell logo appears.
2. Advanced Boot Options menu appears, ‘Repair your Computer' is highlighted, press Enter. (Use the arrow keys to highlight your choice).
3. Windows is loading files screen appears. Wait for it to load.
4. 'System Recovery Options' prompt appears. Specify the language and keyboard input that you want, and then click ‘Next’.
5. Log in as a user who has administrative credentials; select the username from the drop-down list, type the password and click OK.
6. 'Choose a Recovery Tool Window' appears, select 'Dell Data Safe Restore and Emergency Backup'.
7. The Welcome screen will show 2 options; 'Restore computer and preserve my new or changed files' and 'Select other System Backup and more options'. Select the second option (Select other System Backup and more options) and click 'Next'.
8. The next window shows these options; 'Backup Files and folders' and 'Restore my computer'. Select ‘Restore my computer’.
9. Select the 'Factory Image' and click ‘Next’.
10. The next window shows 2 options; 'Preserve new or changed files before restoring to selected System Backup' and 'Restore without preserving new or changed files'. Select the second option (Restore without preserving new or changed files) and click 'Next'.
11. A prompt appears stating that your computer is about to be restored all data currently on your computer will be deleted and replaced with your selected Full System Backup. If an Emergency File & Folder Backup was created, it will still be saved in the location you selected. Click 'Yes, continue' and click 'Next'.
12. PC restore will initiate. Once done, click 'Restart'.
13. Follow the onscreen instructions to create a user account.

Keep me updated. Please reply in case you have any further questions.

i did step 4 and then i have some different options.

-at step 5. i choose username "Dell" (another one is UpdatusUser and i don't have password for another one)

-at step 6. i don't have those options, i have "startup repair", "System restore", "System image recovery", "Windows Memory Diagnostic", "Command Prompt". 

i reinstaled the windows and i have the same problem again...

Here is image of things I have on my laptop:

imageshack.us/.../57443681.png

can you give me link of driver for my laptop? because maybe i have wrong driver :/

Now i found out another thing, when i'm in safe mode with networking and i sit near router i can connect and the signal is great and then when i carry my laptop in another room it works great BUT if i disconnect from network and i try to connect again i lose everything and the same thing happens like before safe mode  

we have the same issues we usually have to disable then reinable the drivers and the times the drivers disappear we must restart the pc for them to show up again