The Pentium 166mhz is a old socket 7 a very early Pentium prossessor,The Pentium 4 is modern form factor,much faster and more prossessor cach than the old chips.
Socket 7
for basic usage , yes you can
Pentium Duo Quad, Pentium core duo, Pentium D, Xeon, Itanium, Pentium M, Pentium 4, Celeron, Pentium 3, Pentium 2, Pentium Pro, 486, 386, 286.
There are version of Intel Pentium one through four as well as Intel Pentium Pro, Intel Pentium D, Intel Pentium M, Pentium (2009), and Pentium Duel Core.
Yes, the official CPU requirement for Windows 7 32-bit is simply a x86 CPU clocked at 1 Ghz or above. Any Intel Pentium 4 meets those technical specifications. About Windows 7 64-bit, it depends on model of Pentium 4 : first models don't support x86-64 instructions but the newer models fully support them. Nowadays, a lot of netbooks with single core Atom are shipped with Windows 7 despite the fact that power processing of these netbooks is significantly below most Pentium 4-based system (especially Pentium 4 with HyperThreading)
Windows 7 32-bit is the highest version compatible with the Pentium III processor. : the official requirement about processor is "a x86 CPU clocked at 1 Ghz or above" and some models of Pentium III meet that technical specification. Please note that only the 32-bit version of Windows 7 can run on Pentium III. Moreover, it is recommended to have at least 1 GB of RAM for Windows 7 32-bit, which is a huge amount for a computer of this era.
Yes, the official CPU requirement for Windows 7 32-bit is simply a x86 CPU clocked at 1 Ghz or above. Any Intel Pentium 4 meets those technical specifications. About Windows 7 64-bit, it depends on model of Pentium 4 : first models don't support x86-64 instructions but the newer models fully support them. Nowadays, a lot of netbooks with single core Atom are shipped with Windows 7 despite the fact that power processing of these netbooks is significantly below most Pentium 4-based system (especially Pentium 4 with HyperThreading)
No. The Pentium predates the Pentium D by more than a decade.
The first Pentium computer.
Because that's the socket Intel manufactured it for.
pentium 4 more faster