If the speed of the wireless network to which you are connected seems to be slow, then you might find it hard to upload or download large files. To increase your Linksys router slow speed, follow the quick steps given on this page.
Solution 1: Power cycle your Linksys router
Turn off the router and remove the power cord from the wall outlet.
After 10 seconds, plug the power cord to the router and power it on.
Check whether you have properly connected the coaxial cable between the router and the modem.