Can someone PLEASE help me fix my internet?

[Anthony]

Didn't get any help last time..

My laptop's connection to the internet isn't working while every other device is working fine. I did multiple tests on the cards, the router, and the laptop itself. Everything is positive.

However, when I wake it from sleep mode, I experience a few problems at random:

It takes more than a minute to connect.

"Unidentified network"

The router doesn't show up in the network sometimes, despite being connected

"Windows cannot connect to the network" (REALLY common)

And many more.

It's starting to piss me off. I tried everything I can to fix it, but these last few days, these problems have persisted. Please help.

Windows 7, Inspiron 1545 Dell