You need to use the Numpad number keys, not the number keys on the top of the keyboard to create the special characters by holding down alt.
Here is a list of Alt key symbols:
ALT + 1 = ?ALT + 2 = ?ALT + 3 = ♥ALT + 4 = ♦ALT + 5 = ♣ALT + 6 = ♠ALT + 7 = •ALT + 8 = ?ALT + 9 = ?
ALT + 14 = ? Musical NoteALT + 15 = ¤ Sunshine SymbolALT + 0169 = © Copyright SymbolALT + 0153 = TM Trademark SymbolALT + 0174 = ® Registered Symbol
Remember, to use the number keys on the right of the keyboard, not the keys at the top.
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if you are looking at the number keys on the right of the keyboard, at the top left of that section there should be a Num Lock key. Press the key and a little ways above it a small light should turn on signifying Num Lock is in effect.
Is it possible for you to tell me the exact model Logitech Wireless keyboard this is? There should be something on the back of the keyboard with this info.
I need to view the keyboard layout to see how we can set you up to access the Numpad keys.
Ok from what I have been able to research, your keyboard does not have a traditional Numpad setup, which is why you are not able to type the special characters by pressing down Alt then one of the number keys.
The number keys on your keyboard just relay to the same number keys at the top of the keyboard, which are not able to type the special characters. This is simply just a limitation in the keyboard that Logitech has made.
You will only be able to type the special characters by using a keyboard that has a Numlock key available on the Numpad.
However not all hope is lost. If you click on Start, then All Programs, then Accessories, then System Tools, then Character Map, you can use the character map to look up special character keys, click on them then press the select button then copy to copy the characters and you can paste them into where ever you want.
You can use the Advanced View option to search for certain special characters by name. In specfic the special characters you seem to be looking for are just a little ways up from the bottom of the Character Map window if you scroll to the bottom first.
I am required to post this as an answer, but please only click on Accept Answer if this sufficiently answers your question and you will leave positive feedback. Otherwise, if you will leave negative or neutral feedback please do not click on Accept Answer and post back here so we can find a better solution.
Sorry that there is not an easier method, but its unfortunate that Logitech would design and sell a keyboard that lacks the full usage of the Numpad.
Regardless, you can click on Accept Answer now to close this question if you are pleased with my help and will leave positive feedback. If you were to leave negative or neutral feedback, please do not click on Accept Answer.