dont know
By upgrading the graphics card.
possibly
It is likely the drivers were not installed correctly when upgrading. This has been a known issue in some Windows 10 builds. You should search your GPU manufacturers website for the latest driver for your card.
You can run the upgrade wizard and if there will be a problem it'll tell you Yes. You have to identify the graphics chip you have. Then get an XP driver for the graphics chip you have.
For regular applications you won't notice a difference but in games, definitely.
No, it will not. The graphics of the game you are playing rely on the graphics chip in the computer. You must upgrade the graphics chip in your computer to improve the game's graphics, unless the game is supposed to have terrible graphics.
In the BIOS.
Yes you can - this applies to Desktop computers however - laptops usually use an on-board graphics card - the manufacturer will usually offer an upgrade service
If money is no concern, start by upgrading CPU. It helps more when running games with alot of data, but definately more to graphics card next
Dell Inspiron E1705/9400 allows for upgrading of the cards and memory modules.
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When having graphic problems with a game on a computer one should make sure their video card drivers are up to date. Sometimes the only solutions are lowering the quality of the graphics in the game or upgrading the graphics card.