The #1 most common issue is WiFi drivers. Try hunting for a WiFi driver update.
Another common issue is drivers that don't handle power savings properly. Try the below commands from an administrative command prompt to set the WiFi NIC to "maximum performance" mode, disabling power saving on it.
powercfg /SETDCVALUEINDEX SCHEME_CURRENT 19cbb8fa-5279-450e-9fac-8a3d5fedd0c1 12bbebe6-58d6-4636-95bb-3217ef867c1a 0
powercfg /SETACVALUEINDEX SCHEME_CURRENT 19cbb8fa-5279-450e-9fac-8a3d5fedd0c1 12bbebe6-58d6-4636-95bb-3217ef867c1a 0