|It would be helpful to know the current specs for the Inspiron 1750, but I agree with grasshopper & larryf215. You do NOT need a killer machine to listen to MP3s & watch Youtube videos.|
Upgrading the RAM amount to 4GB makes sense, 8GB does not. And as long as you have a dual core CPU (Pentium?), I doubt a CPU upgrade is necessary. The Broadcom accelerator definitely isn't needed & as long as the laptop has a built-in wireless adapter, why would you need the USB adapter? What is the purpose of the HDD upgrade?
If you want the Inspiron to run as it's best & you're capable of doing a complete reinstall of Windows, that's what I'd recommend. If it were my laptop, I would wipe out ALL partitioning, then create 2 new partitions - one for the OS, the other for Storage. Format (NTFS), then do a clean install of Win7 using a retail disk. Install the latest device drivers, run Windows Update, install a lightweight anti-virus such as Microsoft's free Security Essentials, then tweak Windows for best performance.