Computer People...please help me with my wireles

One can purchase an external usb modem if you think your internal laptop modem is not working.

I used that for a non modem'd desktop that i needed wireless connection for. It worked pretty well. 

Odds are nothing changed on your end, but something changed outside of your house.  As in, one of your neighbors got a new Wireless Access Point or their AP changed it's channel and is now interfering with yours.

One thing you can do fairly easily is change the channel your AP is broadcasting on.  Typically you just web into your AP, log in and look under wireless settings, radio settings, or something like that.  Whatever channel you're on, just pick a different one and test it.

if you don't know how to web into your AP just open up a command prompt on your PC and type ipconfig. (assuming you're running windows).  the number after "default gateway" is the ip address of your AP.  Just take that and put it in your web browser.  Should be something like 192.168.1.1

If you have an android phone you can geek out a little bit.  Download the free "wifi analyzer" application and run it.  It will give you a graphical representation of all the wireless AP's in your area and whose running on what channels.

This.   I'll also add:  Wire everything you can (devices that don't move) and turn off their wireless.   I live in an apartment building, and I can usually "see" between 15 and 30 wireless access points.... including the high-power one on the cell tower outside my apartment.   Wireless SUCKS in our apartment.   I rearranged all of my devices (thankfully the apartment was pre-wired!) and got the Roku, desktop and Time Machine all running wired instead of wireless.   Such a huge improvement.  Having 3 fewer devices competing for wireless resources makes a huge difference.   We were able to have an hour-long facetime with my parents this weekend... normally that would have included about 5 disconnects.  This week, rock solid!

I second this.  Great tool.  A repeater is always an option too.  

You could always call your cable or DSL provider and have them troubleshoot with you if the wireless router is leased from them.

Decent free PC software for wireless analysis would be inSSIDer. I've used it. I also have two WAP's in my house because of signal strength issues from the junky FIOS cable modem I'm required to use. The primary is on 192.168.1.2, the other on 192.168.2.1.