Is there a way to boost wifi signal on an Insporon One 2305 All-In-One PC. Comes with a internal wifi card

The SB6121 doesn't have WiFi, but I used a wifi extender (~$40-$80) to boost the wifi signal of my current wireless router that's attached to the SB6121.

check your graphic card

I think you can try:

1. Homemade Pringles antenna - Eat a packet of Pringles (ready salted would be my choice) then follow this tutorial to convert it into a functioning directional antenna. Point it where you need a signal boost.
2. Airport Express & kitchen sieve - Take an Airport Express and set it into a common metallic kitchen sieve to boost it's signal further.
3. Try a parabolic dish - Hawking make a 802.11 B/G parabolic dish that basically pulls in a WiFi signal, performs some magic and boosts your range by up to 300%! It only costs $80 and it has a cool retro style.
4. Cantenna - This is basically a pro version of the Pringles tin hack. For $50 you can buy a Cantenna that plugs into your router and extends your WiFi signal. It also looks cool.

Also see this:
The Wi-Fire uses a powerful directional antenna, highly sensitive receiver and proprietary software to find and enhance normal WiFi signals. With it, you can connect wirelessly to the Internet-even at low signal strengths-faster, more reliably and with a more consistently strong connection-than you are able to with an internal wireless adapter.
The Wi-Fire draws very little power from your laptop battery. It comes complete with everything you need to connect wirelessly to the Internet. Just install the Wi-Fire Connection Manager, plug the Wi-Fire into an available USB port and you're ready to start. It can rest on any flat surface, laptop display or flat screen monitor.

your antenna can be seen at the bottom of the laptop. it looks like a battery of cellphone bit it has buttons for wire connections, actually it is called internal wireless card. there are many ways in boosting the wireless signal you can easily search how to boost wireless signal from youtube and you will see exaclty how it is done.

may the antenna on that card your using is faulty and if not you can always use a range expander , or but another router n use it as range expander.

em maybe you just need to change the pc card or honestly just change the pc for fast and efficient browsing.

The only way to boost the signal is to upgrade the internal wireless card to a card with more range. Research the various Broadcom and Intel wireless cards and find one that meets the range you need. Most of the cards are interchangeable, so even though it may not have been offered for your machine, it will work, with the proper drivers.

built in wifi cards are very limited in range, get an external pc card
then you can get an antenna to connect to that if needed.
I use both and find the external card is best in reception.
you can connect an antenna to the internal card but you will have to leave the access panel open or make a hole in it.

usb not bestto use need new wirless n linksys ok on sale 99 cc this week and n pcmia card to go in labtop up to 1000 ft away 5 bars ok

It is also possible that you have set a security connection on your computer and the new router is not set to the same security settings. If they don't match, you will not connect...nor will anyone trying to 'steal' your signal.