Thank you for your answer

I downloaded cpanm and extracted it to the C directory

Then, I typed in "C:\>cpanm install DBI" on the command prompt

It somewhat worked. The module was being installed, up until an error showed up. It tells me to see a build log on the .cpanm directory.

Upon finding the build log, I scrolled all the way down to find this error:
"dmake.exe: Error code 129, while making 'Perl.o'"
It is the same error I get if I install it using the cpan utility that the user AnomalousMonk suggested..

Strangely, there is a line after I failed to install the module:
"1 distribution installed"

What should I do now?

You shouldn't have to download cpanm. DWIM perl is a distro based on Strawberry (while old it should already have cpanm). Do you have multiple perl installations on your machine?

Update:Also, DWIM perl seems down. reported, very quickly fixed by SZABGAB

Please show other (10 or so) lines before dmake.exe: Error code 129, while making 'Perl.o' to provide more context.

Here's the last lines of text before the error showed up:

Perl.c:1356:5: note: in expansion of macro 'dVAR'
dVAR; dXSARGS;

^~~~

Perl.c: In function 'XS_DBD__Perl__st_FETCH_attrib':
C:\Dwimperl\perl\lib\CORE/perl.h:340:39: warning: unused variable 'Perl___notused' -Wunused-variable #define dNOOP extern int /*@unused@*/ Perl___notused PERL_UNUSED_DECL

^

C:\Dwimperl\perl\lib\CORE/perl.h:162:17: note: in expansion of macro 'dNOOP'
# define dVAR dNOOP

^~~~~

Perl.c:1384:5: note: in expansion of macro 'dVAR'
dVAR; dXSARGS;

^~~~

Perl.c: In function 'XS_DBD__Perl__st_DESTROY':
C:\Dwimperl\perl\lib\CORE/perl.h:340:39: warning: unused variable 'Perl___notused' -Wunused-variable
#define dNOOP extern int /*@unused@*/ Perl___notused PERL_UNUSED_DECL

^ C:\Dwimperl\perl\lib\CORE/perl.h:162:17: note: in expansion of macro 'dNOOP'
# define dVAR dNOOP

^~~~~

Perl.c:1412:5: note: in expansion of macro 'dVAR'
dVAR; dXSARGS;

^~~~

Perl.c: In function 'boot_DBD__Perl':
C:\Dwimperl\perl\lib\CORE/perl.h:340:39: warning: unused variable 'Perl___notused' -Wunused-variable
#define dNOOP extern int /*@unused@*/ Perl___notused PERL_UNUSED_DECL

^

C:\Dwimperl\perl\lib\CORE/perl.h:162:17: note: in expansion of macro 'dNOOP'
# define dVAR dNOOP

^~~~~

Perl.c:1470:5: note: in expansion of macro 'dVAR'
dVAR; dXSARGS;

^~~~