I suggest that you download CCLEANER then run it, hit the option's button then settings,put a tick next to Run Ccleaner when the computer starts.
Also when in options go to advanced tab and put a tick next to close program after cleaning.
This will automate the temporary file removal on your machine and keep it speedy.
Disable all of the start ups on the machine except your antivirus. ( In your case sandboxie as well)
To disable hit the tools button then the start up button,then disable
Open your device manager, hit the start button then copy and paste devmgmt.msc into the start search box hit enter.
Left click the + next to network adapters, right click and un-install your wireless driver and your ethernet driver, make sure and do not tick the box that says delete driver.
Then, click the View menu and select Show hidden devices
Then hit view again and select devices by connection.
Then scroll down right click and uninstall the drivers listed below,dont worry these will be reinstalled upon reboot by windows.
- Ancillary Function Driver for Winsock
- Net BT
- Net Io Legacy Support Driver
- Tcp/ip Protical Driver
- Tcp/ip Registry Compatibility
- NSI proxy Service
- ide channel
- Nd Proxy
- Security Driver
- Security Processor Loader Driver
- Windows Firewall Authorization Driver
Each of these files will request a reboot after uninstall wait until the last one to reboot.
Run This to find the best dns server for your machine, shut down your antivirus while it runs.
Then once the tool has completed, and displayed the best DNS for your machine, apply the settings.
Open an Elevated Command Prompt
Copy and paste the content of the code box, one at a time hitting enter after each.
Then disable Ipv6 with this Ms Fixit.
Remove the tunnel adapters, with this Ms Fixit.
Download TCP Optimizer.
Save it to your desktop.
Right Click Run As Administrator.
At the bottom right hand corner, of TCP optimizer select optimal
The hit apply, ok, and ok again then reboot.